Fabrication of super-elastic graphene aerogels by ambient pressure drying and application to adsorption of oils  

作　　者：Xinxin Zhao Wenlong Xu Shuang Chen Huie Liu Xiaofei Yan Yan Bao Zexin Liu Fan Yang Huan Zhang Ping Yu 

机构地区：[1]State Key Laboratory of Heavy Oil Processing,China University of Petroleum(Huadong),Qingdao 266580,China [2]Qingdao Institute of Bioenergy and Bioprocess Technology,Chinese Academy of Sciences,Qingdao 266101,China

出　　处：《Chinese Journal of Chemical Engineering》2022年第7期89-97,共9页中国化学工程学报（英文版）

基　　金：the financial support of National Natural Science Foundation of China (22078366)

摘　　要：Three-dimensional graphene-based aerogels have promising applications in oil adsorption and environmental restoration.However,current research of graphene-based aerogels is often hindered by high preparation cost,poor mechanical properties and low recycling efficiency.Here,superelastic graphene aerogel(SGA)was prepared through one-step freezing and twice hydrothermal reduction followed by drying under ambient pressure.The simple atmospheric drying provides a possibility for large-scale preparation of high performance graphene-based aerogels.The prepared SGA not only has the ability of highly repeatable compression rebound,but also exhibits excellent oil adsorption performance.And the overall performance of SGA is better than most of graphenebased aerogels prepared by freeze drying.After the SGA was cyclically compressed with 70%strain for 300 times,it can return to the original shape and height substantially.SGA retained about 90%of the initial adsorption capacity after 50 cycles of adsorption and compression regeneration for cyclohexane.

关 键 词：Graphene aerogels Super-elastic Ambient pressure drying Adsorption and regeneration of oil 

分 类 号：TQ427.26[化学工程] TQ424[环境科学与工程—环境工程] X703